package com.heima.wemedia.service.impl;


import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.api.R;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.common.constants.WemediaConstants;
import com.heima.common.constants.WmNewsMessageConstants;
import com.heima.common.exception.CustomException;
import com.heima.model.common.dtos.PageResponseResult;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.wemedia.dtos.WmNewsDto;
import com.heima.model.wemedia.dtos.WmNewsPageReqDto;
import com.heima.model.wemedia.pojos.WmMaterial;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmNewsMaterial;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.utils.thread.WmThreadLocalUtil;
import com.heima.wemedia.mapper.WmMaterialMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmNewsMaterialMapper;
import com.heima.wemedia.service.WmMaterialService;
import com.heima.wemedia.service.WmNewsAutoScanService;
import com.heima.wemedia.service.WmNewsService;
import com.heima.wemedia.service.WmNewsTaskService;
import lombok.extern.slf4j.Slf4j;
import net.sourceforge.tess4j.TesseractException;
import org.apache.commons.lang3.StringUtils;
import org.checkerframework.checker.units.qual.A;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.io.IOException;
import java.util.*;
import java.util.stream.Collectors;

@Service
@Slf4j
@Transactional
public class WmNewsServiceImpl extends ServiceImpl<WmNewsMapper, WmNews> implements WmNewsService {

    @Autowired
    private WmNewsMaterialMapper wmNewsMaterialMapper;
    @Autowired
    private WmMaterialMapper wmMaterialMapper;
    @Autowired
    private KafkaTemplate<String, String> kafkaTemplate;

    /**
     * 条件查询文章的列表
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult findList(WmNewsPageReqDto dto) {
        //1.检查参数
        if(dto == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //分页参数检查
        dto.checkParam();
        //获取当前登录人的信息
        WmUser user = WmThreadLocalUtil.getUser();
        if(user == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.NEED_LOGIN);
        }

        //2.分页条件查询
        IPage page = new Page(dto.getPage(),dto.getSize());
        LambdaQueryWrapper<WmNews> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        //状态精确查询
        if(dto.getStatus() != null){
            lambdaQueryWrapper.eq(WmNews::getStatus,dto.getStatus());
        }

        //频道精确查询
        if(dto.getChannelId() != null){
            lambdaQueryWrapper.eq(WmNews::getChannelId,dto.getChannelId());
        }

        //时间范围查询
        if(dto.getBeginPubDate()!=null && dto.getEndPubDate()!=null){
            lambdaQueryWrapper.between(WmNews::getPublishTime,dto.getBeginPubDate(),dto.getEndPubDate());
        }

        //关键字模糊查询
        if(StringUtils.isNotBlank(dto.getKeyword())){
            lambdaQueryWrapper.like(WmNews::getTitle,dto.getKeyword());
        }

        //查询当前登录用户的文章
        lambdaQueryWrapper.eq(WmNews::getUserId,user.getId());

        //发布时间倒序查询
        lambdaQueryWrapper.orderByDesc(WmNews::getCreatedTime);

        page = page(page,lambdaQueryWrapper);

        //3.结果返回
        ResponseResult responseResult = new PageResponseResult(dto.getPage(),dto.getSize(),(int)page.getTotal());
        responseResult.setData(page.getRecords());

        return responseResult;
    }

    @Autowired
    WmNewsAutoScanService wmNewsAutoScanService;
    @Autowired
    WmNewsTaskService wmNewsTaskService;

    @Override
    public ResponseResult submitNews(WmNewsDto dto) {
        //条件判断
        if (dto == null || dto.getContent() == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);

        }

        //保存或修改文章
        WmNews wmNews = new WmNews();
        BeanUtils.copyProperties(dto, wmNews);
        //封面图片的赋值
        if (dto.getImages() != null && dto.getImages().size() > 0) {

            String imageStr = StringUtils.join(dto.getImages(), ",");
            wmNews.setImages(imageStr);
        }
        //如果当前的封面类型是自动-1
        if (dto.getType().equals(WemediaConstants.WM_NEWS_TYPE_AUTO)) {
            wmNews.setType(null);
        }
        saveOrUpdateWnews(wmNews);
        //判断是否为草稿，如果是草稿就结束当前的方法
        if (dto.getStatus().equals(WmNews.Status.NORMAL.getCode())) {
            return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);

        }
        //不是草稿，保存文章内容图片和素材的关系
        List<String> materials = ectractUrlInfo(dto.getContent());

        saveRelativeInfoForContent(materials, wmNews.getId());
        //不是草稿，保存文章封面图片和素材的关系
        saveRelativeInfoForCover(dto, wmNews, materials);
        //审核文章
//
//        try {
//            wmNewsAutoScanService.autoScanWmNews(wmNews.getId());
//        } catch (Exception e) {
//            throw new RuntimeException(e);
//        }
        wmNewsTaskService.addNewsToTask(wmNews.getId(), wmNews.getPublishTime());

        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    private void saveRelativeInfoForCover(WmNewsDto dto, WmNews wmNews, List<String> materials) {

        List<String> images = dto.getImages();
        //功能1：封面类型是自动，设置封面类型的数据
        if (dto.getTitle().equals(WemediaConstants.WM_NEWS_TYPE_AUTO)) {
            //多图
            if (materials.size() >= 3) {
                wmNews.setType(WemediaConstants.WM_NEWS_MANY_IMAGE);
                images = materials.stream().limit(3).collect(Collectors.toList());


            } else if (materials.size() > 1 && materials.size() < 3) {
                //单图
                wmNews.setType(WemediaConstants.WM_NEWS_SINGLE_IMAGE);
                images = materials.stream().limit(1).collect(Collectors.toList());

            } else {
                //无图
                wmNews.setType(WemediaConstants.WM_NEWS_NONE_IMAGE);

            }
            //修改文章
            if (images != null && images.size() > 0) {
                wmNews.setImages(StringUtils.join(images, ","));

            }
            updateById(wmNews);

        }

        //功能2：保存封面图片和素材的关系
        if (images != null && images.size() > 0) {
            saveRelativeInfo(images, wmNews.getId(), WemediaConstants.WM_COVER_REFERENCE);
        }

    }


    /**
     * 保存文章内容图片和素材的关系
     *
     * @param materials
     * @param id
     */
    private void saveRelativeInfoForContent(List<String> materials, Integer id) {

        saveRelativeInfo(materials, id, WemediaConstants.WM_CONTENT_REFERENCE);

    }

    /**
     * 保存文章图片和素材的关系
     *
     * @param materials
     * @param id
     */
    private void saveRelativeInfo(List<String> materials, Integer id, Short type) {
        if (materials != null && !materials.isEmpty()) {
            //通过图片的url查询素材的id
            List<WmMaterial> wmMaterials = wmMaterialMapper.selectList(Wrappers.<WmMaterial>lambdaQuery().in(WmMaterial::getUrl, materials));
            if (wmMaterials == null || wmMaterials.size() == 0) {
                //手动抛出异常
                throw new CustomException(AppHttpCodeEnum.MATERIALS_REFERENCE_FAIL);
            }
            if (materials.size() != wmMaterials.size()) {
                //手动抛出异常
                throw new CustomException(AppHttpCodeEnum.MATERIALS_REFERENCE_FAIL);
            }
            List<Integer> ids = wmMaterials.stream().map(WmMaterial::getId).collect(Collectors.toList());

            //批量保存
            wmNewsMaterialMapper.saveRelations(ids, id, type);
        }

    }

    /**
     * 提取文章内容里的图片信息
     *
     * @param content
     * @return
     */
    private List<String> ectractUrlInfo(String content) {
        List<String> materials = new ArrayList<>();


        List<Map> maps = JSON.parseArray(content, Map.class);
        for (Map map : maps) {
            if (map.get("type").equals("image")) {
                String imageUrl = (String) map.get("value");
                materials.add(imageUrl);

            }

        }
        return materials;

    }

    /**
     * 保存或修改文章
     *
     * @param wmNews
     */
    private void saveOrUpdateWnews(WmNews wmNews) {
        //补全属性
        wmNews.setUserId(WmThreadLocalUtil.getUser().getId());
        wmNews.setCreatedTime(new Date());
        wmNews.setSubmitedTime(new Date());
        wmNews.setEnable((short) 1);

        if (wmNews.getId() == null) {
            //保存
            save(wmNews);
        } else {
            //修改
            //删除文章图片和素材的关系
            wmNewsMaterialMapper.delete(Wrappers.<WmNewsMaterial>lambdaQuery().eq(WmNewsMaterial::getNewsId, wmNews.getId()));
            updateById(wmNews);
        }

    }

    /**
     * 文章的上下架
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult downOrUp(WmNewsDto dto) {
        //检查参数
        if (dto.getId() == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //查询文章
        WmNews wmNews = getById(dto.getId());
        if (wmNews == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST, "文章不存在");

        }
        //判断文章是否已经发布
        if (!wmNews.getStatus().equals(WmNews.Status.PUBLISHED.getCode())) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST, "当前文章不是发布状态,不能进行上下架");

        }
        //修改文章enable字段
        if (dto.getEnable() != null && dto.getEnable() > -1 && dto.getEnable() < 2) {
            update(Wrappers.<WmNews>lambdaUpdate().set(WmNews::getEnable, dto.getEnable())
                    .eq(WmNews::getId, wmNews.getId()));

            //发送消息通知article修改文章的配置
            if (wmNews.getArticleId()!=null){
                Map<String, Object> map = new HashMap<>();
                map.put("articleId", wmNews.getArticleId());
                map.put("enable", dto.getEnable());
                kafkaTemplate.send(WmNewsMessageConstants.WM_NEWS_UP_OR_DOWN_TOPIC,JSON.toJSONString(map));

            }

        }


        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }
}
